表模式中AUTO_INCREMENT = 20018215的含义是什么

Question

CREATE TABLE `tblspmaster` (
  `CSN` bigint(20) NOT NULL AUTO_INCREMENT,
  `SP` varchar(50) NOT NULL,
  `FileImportedDate` date NOT NULL,
  `AMZFileName` varchar(580) NOT NULL,
  `CasperBatch` varchar(50) NOT NULL,
  `BatchProcessedDate` date NOT NULL,
  `ExpiryDate` date NOT NULL,
  `Region` varchar(50) NOT NULL,
  `FCCity` varchar(50) NOT NULL,
  `VendorID` int(11) NOT NULL,
  `LocationID` int(11) NOT NULL,
  PRIMARY KEY (`CSN`)
) ENGINE=InnoDB AUTO_INCREMENT=20018215 DEFAULT CHARSET=latin1;

What is the meaning of AUTO_INCREMENT=20018215 here in table schema . as i am inserting 500k records my identity is OK from 1 to 500k but when i tried to insert next 500k records, next records identity column value is 524281 instead of 500001 .

Answer 1

这意味着（自动分配给CSN ）第一个值是20018215

Answer 2

The large initial value, 20018215, was probably the previous value of the auto increment when you did a "Send to SQL Editor" -> "Create Statement" menu selection in MySQL Workbench. This is just a safe value to skip over existing data just in case you have to reimport the previous records.

I had the same question, but after generating several "Create" edit templates from known tables, I noticed the AUTO_INCREMENT value corresponded to the quantity of existing records in those tables. I removed the large values from my templates since I want my new tables to begin with a primary key = 1.